PRESIDIUM Duo Tester PDT II Mode D'emploi page 15

Cleaning your gemstone prior to testing
Prepare a clean tissue or jewelry cloth. Carefully retrieve
the gemstone with tweezers and place the gemstone face
down on its table facet. (Fig. 1.7a).
Fig. 1.7a
Gently rub the table of the gemstone against the tissue/
jewelry cloth (Fig. 1.7b)
Fig. 1.7b
If your stone is mounted in jewelry, please carefully clean
the stone (Fig 1.7c)
Fig. 1.7c
15